The store will not work correctly when cookies are disabled.
JavaScript seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Javascript in your browser.
Polyurethane U-Seal, 1.75 Inch OD, 1.38 Inch ID, 0.38 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U18-1.37-37B
Alternate Part Numbers
Alternate Part Number
C1DN45 ,
Alternate Part Number
MI-02250015 ,
Alternate Part Number
MINO-00407X31579
trying to match up a u-seal i pulled, are these dimensions 1.75 od by 1.375 id and 0.375 tall?
Question by: Larry M on May 18, 2025, 9:09 AM
The key measurements on this U-seal are 1.75 inch OD, 1.375 inch ID, and 0.375 inch height, with a 0.1875 inch cross section. It is the style where the height is greater than the cross section, so it’s meant for standard gland setups that have that extra height.
Answer by: Customer Support on May 19, 2025, 10:13 AM
How much heat can these seals take before they start to fail?
Question by: Brent C on Sep 29, 2025, 8:07 AM
This U-seal is rated to handle temperatures from -65°F all the way up to 220°F, so it should hold up well in most hydraulic systems.
Answer by: Customer Support on Sep 30, 2025, 7:22 PM
Got a cylinder rod that's been leaking on a press we run pretty hard, measures out at 1.375 inch on the rod diameter. Would this seal be the right fit for that kind of application?
Question by: Ralph E on Nov 26, 2025, 8:39 AM
For a 1.375 inch rod, the ID on this seal matches up at 1.375 inches, with a 1.75 inch OD and 0.375 inch height. U-seals like this one are built for reciprocating rod applications in hydraulic equipment, so a leaking press rod is exactly the kind of job it's made for. It's rated up to 6,000 PSI, so unless your press is running beyond that, the pressure range shouldn't be a limiting factor.
Answer by: Customer Support on Nov 27, 2025, 3:31 PM
Similar Products
Model Number
Cross Section
I.D.
O.D.
H
Price
Buy Now
U12-0.62-25B
0.125 in
0.625 in
0.875 in
0.25 in
U12-1.00-25B
0.125 in
1 in
1.25 in
0.25 in
U12-1.25-SQB
0.125 in
1.25 in
1.5 in
0.125 in
U18-1.25-SQB
0.1875 in
1.25 in
1.625 in
0.1875 in
U18-1.75-37B
0.1875 in
1.75 in
2.125 in
0.375 in
U18-2.12-SQB
0.1875 in
2.125 in
2.5 in
0.1875 in
U18-2.50-31B
0.1875 in
2.5 in
2.875 in
0.3125 in
U25-1.25-37B
0.25 in
1.25 in
1.75 in
0.375 in
U25-1.50-37B
0.25 in
1.5 in
2 in
0.375 in
U25-2.00-37B
0.25 in
2 in
2.5 in
0.375 in
U25-2.50-37B
0.25 in
2.5 in
3 in
0.375 in
U25-3.00
0.25 in
3 in
3.5 in
0.25 in
U25-3.00-37B
0.25 in
3 in
3.5 in
0.375 in
U25-3.50-37B
0.25 in
3.5 in
4 in
0.375 in
U25-4.00-SQB
0.25 in
4 in
4.5 in
0.25 in
U25-4.50
0.25 in
4.5 in
5 in
0.25 in
U25-5.00
0.25 in
5 in
5.5 in
0.25 in
U12-0.18-25B
0.125 in
0.1875 in
0.438 in
0.25 in
U12-0.25-25B
0.125 in
0.25 in
0.5 in
0.25 in
U12-0.25-SQB
0.125 in
0.25 in
0.5 in
0.125 in
U12-0.31-25B
0.125 in
0.3125 in
0.563 in
0.25 in
U12-0.31-SQB
0.125 in
0.3125 in
0.563 in
0.125 in
U12-0.37
0.125 in
0.375 in
0.625 in
0.125 in
U12-0.50-25B
0.125 in
0.5 in
0.75 in
0.25 in
U12-0.50-SQB
0.125 in
0.5 in
0.75 in
0.125 in
U12-0.56
0.125 in
0.625 in
0.938 in
0.125 in
U12-0.62-SQB
0.125 in
0.625 in
0.875 in
0.125 in
U12-0.68
0.125 in
0.6875 in
0.938 in
0.125 in
U12-0.75-18B
0.125 in
0.75 in
1 in
0.1875 in
U12-0.75-25B
0.125 in
0.75 in
1 in
0.25 in
U12-0.75-SQB
0.125 in
0.75 in
1 in
0.125 in
U12-0.81
0.125 in
0.8125 in
1.063 in
0.125 in
U12-0.87-25B
0.125 in
0.875 in
1.125 in
0.25 in
U12-0.87-SQB
0.125 in
0.875 in
1.125 in
0.125 in
U12-1.00-18B
0.125 in
1 in
1.25 in
0.1875 in
U12-1.00-SQB
0.125 in
1 in
1.25 in
0.125 in
U12-1.06-SQB
0.125 in
1.0625 in
1.313 in
0.125 in
U12-1.12-25B
0.125 in
1.0625 in
1.375 in
0.25 in
U12-1.12-SQB
0.125 in
1.0625 in
1.375 in
0.125 in
U12-1.18
0.125 in
0.188 in
1.438 in
0.125 in
U12-1.18-18B
0.125 in
0.188 in
1.438 in
0.1875 in
U12-1.18-25B
0.125 in
0.188 in
1.438 in
0.25 in
U12-1.25-18B
0.125 in
1.25 in
1.5 in
0.1875 in
U12-1.25-25B
0.125 in
1.25 in
1.5 in
0.25 in
U12-1.37-25B
0.125 in
1.375 in
1.625 in
0.25 in
U12-1.37-SQB
0.125 in
1.375 in
1.625 in
0.125 in
U12-1.50-25B
0.125 in
1.5 in
1.75 in
0.25 in
U12-1.50-SQB
0.125 in
1.5 in
1.75 in
0.125 in
U12-1.62-SQB
0.125 in
1.625 in
1.875 in
0.125 in
U12-1.75-SQB
0.125 in
1.75 in
2 in
0.125 in
U12-2.00
0.125 in
2 in
2.25 in
0.125 in
U12-2.25
0.125 in
2.25 in
2.5 in
0.125 in
U12-2.75
0.125 in
2.75 in
3 in
0.125 in
U15-1.18
0.1563 in
0.188 in
1.5 in
0.1563 in
U15-1.25
0.1563 in
1.25 in
1.563 in
0.1563 in
U15-1.37
0.1563 in
1.375 in
1.688 in
0.1563 in
U18-0.50
0.1875 in
0.5 in
0.875 in
0.1875 in
U18-0.62-31B
0.1875 in
0.625 in
1 in
0.3125 in
U18-0.62-SQB
0.1875 in
0.625 in
1 in
0.1875 in
U18-0.75-31B
0.1875 in
0.75 in
1.125 in
0.3125 in
U18-0.75-SQB
0.1875 in
0.75 in
1.125 in
0.1875 in
U18-0.87-31B
0.1875 in
0.875 in
1.25 in
0.3125 in
U18-0.87-SQB
0.1875 in
0.875 in
1.25 in
0.1875 in
U18-1.00-25B
0.1875 in
1 in
1.375 in
0.25 in
U18-1.00-31B
0.1875 in
1 in
1.375 in
0.3125 in
U18-1.00-37B
0.1875 in
1 in
1.375 in
0.375 in
U18-1.00-SQB
0.1875 in
1 in
1.375 in
0.1875 in
U18-1.12-25B
0.1875 in
1.0625 in
1.5 in
0.25 in
U18-1.12-31B
0.1875 in
1.0625 in
1.5 in
0.3125 in
U18-1.12-SQB
0.1875 in
1.0625 in
1.5 in
0.1875 in
U18-1.18
0.1875 in
0.188 in
1.563 in
0.1875 in
U18-1.25-25B
0.1875 in
1.25 in
1.625 in
0.25 in
U18-1.25-31B
0.1875 in
1.25 in
1.625 in
0.3125 in
U18-1.25-37B
0.1875 in
1.25 in
1.625 in
0.375 in
U18-1.37-25B
0.1875 in
1.375 in
1.75 in
0.25 in
U18-1.37-31B
0.1875 in
1.375 in
1.75 in
0.3125 in
U18-1.37-37B
0.1875 in
1.375 in
1.75 in
0.375 in
U18-1.37-SQB
0.1875 in
1.375 in
1.75 in
0.1875 in
U18-1.50-25B
0.1875 in
1.5 in
1.875 in
0.25 in
U18-1.50-31B
0.1875 in
1.5 in
1.875 in
0.3125 in
U18-1.50-37B
0.1875 in
1.5 in
1.875 in
0.375 in
U18-1.50-SQB
0.1875 in
1.5 in
1.875 in
0.1875 in
U18-1.62
0.1875 in
1.625 in
2 in
0.1875 in
U18-1.62-25B
0.1875 in
1.625 in
2 in
0.25 in
U18-1.62-31B
0.1875 in
1.625 in
2 in
0.3125 in
U18-1.62-37B
0.1875 in
1.625 in
2 in
0.375 in
U18-1.62-SQB
0.1875 in
1.625 in
2 in
0.1875 in
U18-1.75-25B
0.1875 in
1.75 in
2.125 in
0.25 in
U18-1.75-31B
0.1875 in
1.75 in
2.125 in
0.3125 in
U18-1.75-SQB
0.1875 in
1.75 in
2.125 in
0.1875 in
U18-1.87-37B
0.1875 in
1.875 in
2.25 in
0.375 in
U18-1.87-SQB
0.1875 in
1.875 in
2.25 in
0.1875 in
U18-2.00-31B
0.1875 in
2 in
2.375 in
0.3125 in
U18-2.00-37B
0.1875 in
2 in
2.375 in
0.375 in
U18-2.00-SQB
0.1875 in
2 in
2.375 in
0.1875 in
U18-2.12-25B
0.1875 in
2.125 in
2.5 in
0.25 in
U18-2.25-37B
0.1875 in
2.25 in
2.625 in
0.375 in
U18-2.25-SQB
0.1875 in
2.25 in
2.625 in
0.1875 in
U18-2.37-SQB
0.1875 in
2.375 in
2.75 in
0.1875 in
U18-2.50-25B
0.1875 in
2.5 in
2.875 in
0.25 in
U18-2.50-37B
0.1875 in
2.5 in
2.875 in
0.375 in
U18-2.50-SQB
0.1875 in
2.5 in
2.875 in
0.1875 in
U18-2.62-37B
0.1875 in
2.625 in
3 in
0.375 in
U18-2.62-SQB
0.1875 in
2.625 in
3 in
0.1875 in
U18-2.75-37B
0.1875 in
2.75 in
3.125 in
0.375 in
U18-2.75-SQB
0.1875 in
2.75 in
3.125 in
0.1875 in
U18-2.87
0.1875 in
2.875 in
3.25 in
0.1875 in
U18-3.00
0.1875 in
3 in
3.375 in
0.1875 in
U18-3.00-37B
0.1875 in
3 in
3.375 in
0.375 in
U18-3.12-37B
0.1875 in
3.125 in
3.5 in
0.375 in
U18-3.12-SQB
0.1875 in
3.125 in
3.5 in
0.1875 in
U18-3.50-37B
0.1875 in
3.5 in
3.875 in
0.375 in
U18-3.62-37B
0.1875 in
3.625 in
4 in
0.375 in
U18-3.62-SQB
0.1875 in
3.625 in
4 in
0.1875 in
U18-4.00-37B
0.1875 in
4 in
4.375 in
0.375 in
U25-0.75
0.25 in
0.75 in
1.25 in
0.25 in
U25-0.93
0.25 in
0.8125 in
1.438 in
0.25 in
U25-1.00-37B
0.25 in
1 in
1.5 in
0.375 in
U25-1.00-SQB
0.25 in
1 in
1.5 in
0.25 in
U25-1.12
0.25 in
1.0625 in
1.625 in
0.25 in
U25-1.12-37B
0.25 in
1.0625 in
1.625 in
0.375 in
U25-1.18
0.25 in
0.188 in
1.688 in
0.25 in
U25-1.25-SQB
0.25 in
1.25 in
1.75 in
0.25 in
U25-1.37
0.25 in
1.375 in
1.875 in
0.25 in
U25-1.37-37B
0.25 in
1.375 in
1.875 in
0.375 in
U25-1.50-31B
0.25 in
1.5 in
2 in
0.3125 in
U25-1.50-SQB
0.25 in
1.5 in
2 in
0.25 in
U25-1.75
0.25 in
1.75 in
2.25 in
0.25 in
U25-1.75-37B
0.25 in
1.75 in
2.25 in
0.375 in
U25-1.87-37B
0.25 in
1.875 in
2.375 in
0.375 in
U25-2.00-31B
0.25 in
2 in
2.5 in
0.3125 in
U25-2.00-SQB
0.25 in
2 in
2.5 in
0.25 in
U25-2.12-37B
0.25 in
2.125 in
2.625 in
0.375 in
U25-2.25
0.25 in
2.25 in
2.75 in
0.25 in
U25-2.25-37B
0.25 in
2.25 in
2.75 in
0.375 in
U25-2.37-37B
0.25 in
2.375 in
2.875 in
0.375 in
U25-2.50-SQB
0.25 in
2.5 in
3 in
0.25 in
U25-2.62-37B
0.25 in
2.625 in
3.125 in
0.375 in
U25-2.75-37B
0.25 in
2.75 in
3.25 in
0.375 in
U25-2.75-SQB
0.25 in
2.75 in
3.25 in
0.25 in
U25-3.25-37B
0.25 in
3.25 in
3.75 in
0.375 in
U25-3.50
0.25 in
3.5 in
4 in
0.25 in
U25-3.50-SQB
0.25 in
3.5 in
4 in
0.25 in
U25-3.75-37B
0.25 in
3.75 in
4.25 in
0.375 in
U25-3.75-SQB
0.25 in
3.75 in
4.25 in
0.25 in
U25-4.00-37B
0.25 in
4 in
4.5 in
0.375 in
U25-4.00-50D
0.25 in
4 in
4.5 in
0.5 in
U25-4.00-56B
0.25 in
4 in
4.5 in
0.5625 in
U25-4.50-37B
0.25 in
4.5 in
5 in
0.375 in
U25-4.50-56B
0.25 in
4.5 in
5 in
0.5625 in
U25-4.50-62B
0.25 in
4.5 in
5 in
0.625 in
U25-5.00-37B
0.25 in
5 in
5.5 in
0.375 in
U25-5.50
0.25 in
5.5 in
6 in
0.25 in
U25-5.50-37B
0.25 in
5.5 in
6 in
0.375 in
U25-5.50-56B
0.25 in
5.5 in
6 in
0.5625 in
U31-1.00-50B
0.3125 in
1 in
1.625 in
0.5 in
U31-1.25
0.3125 in
1.25 in
1.875 in
0.3125 in
U31-1.25-37B
0.3125 in
1.25 in
1.875 in
0.375 in
U31-1.37-37B
0.3125 in
1.375 in
2 in
0.375 in
U31-1.37-SQB
0.3125 in
1.375 in
2 in
0.3125 in
U31-1.50
0.3125 in
1.5 in
2.125 in
0.3125 in
U31-1.75-37B
0.3125 in
1.75 in
2.375 in
0.375 in
U31-1.87
0.3125 in
1.875 in
2.5 in
0.3125 in
U31-2.00
0.3125 in
2 in
2.625 in
0.3125 in
U31-2.00-50B
0.3125 in
2 in
2.625 in
0.5 in
U31-2.25-50B
0.3125 in
2.25 in
2.875 in
0.5 in
U31-2.37
0.3125 in
2.375 in
3 in
0.3125 in
U31-2.50
0.3125 in
2.5 in
3.125 in
0.3125 in
U31-2.50-50B
0.3125 in
2.5 in
3.125 in
0.5 in
U31-2.75
0.3125 in
2.75 in
3.375 in
0.3125 in
U31-2.75-50B
0.3125 in
2.75 in
3.375 in
0.5 in
U31-2.87
0.3125 in
2.875 in
3.5 in
0.3125 in
U31-3.00-50B
0.3125 in
3 in
3.625 in
0.5 in
U31-3.37-50B
0.3125 in
3.375 in
4 in
0.5 in
U31-4.00
0.3125 in
4 in
4.625 in
0.3125 in
U31-4.00-56B
0.3125 in
4 in
4.625 in
0.5625 in
U31-4.37
0.3125 in
4.375 in
5 in
0.3125 in
U31-4.50
0.3125 in
4.5 in
5.125 in
0.3125 in
U37-1.25
0.375 in
1.25 in
2 in
0.375 in
U37-1.75
0.375 in
1.75 in
2.5 in
0.375 in
U37-2.50-50B
0.375 in
2.5 in
3.25 in
0.5 in
U37-2.75
0.375 in
2.75 in
3.5 in
0.375 in
U37-3.25-50B
0.375 in
3.25 in
4 in
0.5 in
U37-3.50
0.375 in
3.5 in
4.25 in
0.375 in
U37-3.75-50D
0.375 in
3.75 in
4.5 in
0.5 in
U37-4.00-62B
0.375 in
4 in
4.75 in
0.625 in
U37-4.25-50D
0.375 in
4.25 in
5 in
0.5 in
U37-4.25-62B
0.375 in
4.25 in
5 in
0.625 in
U37-4.25-SQB
0.375 in
4.25 in
5 in
0.375 in
U37-4.50-62B
0.375 in
4.5 in
5.25 in
0.625 in
U37-5.00-62B
0.375 in
5 in
5.75 in
0.625 in
U37-5.25
0.375 in
5.25 in
6 in
0.375 in
U37-5.25-50D
0.375 in
5.25 in
6 in
0.5 in
U37-6.25-50D
0.375 in
6.25 in
7 in
0.5 in
U50-2.00-SQB
0.5 in
2 in
3 in
0.5 in
U50-2.50
0.5 in
2.5 in
3.5 in
0.5 in
